Here's a tip, never run the soundcard configuration program.

Okay, your Soundblaster 128 pci has an Ensoniq 1371 chipset. Lets try this in a console as root:
Code:
modprobe es1371
This should load the driver for the card.

Now open an audio player and see if you get sound, if you do, add the line "es1371" to /etc/modules

If you booted with "alsa" as a cheatcode, or the first method didn't work, then try this in a console as root:
Code:
/etc/init.d/alsa-autoconfig start
Please post your results